“Shishunki Byo” is a song released by YAPOOS and included on their third single EP Honnou no Shoujo as track #2 and fifth album HYS as track #5.

思春期病 – Shishunki Byo/Puberty Trouble

Say I’m a liar
But my lying habits won’t get better
Dreams and reality,all the same
My steps are unsteady
My heart beats even when I’m calm
Locked the door
Say I’m moody
The daytime and nighttime are different
Tired,happy
Maybe I should pray to god
I’m such a bad child
Leaning on the windowside
Tomorrow I celebrate my birthday
Last year,about this time,my body was heavy
As though it refused to grow
It’s always puberty,tomorrow’s my birthday